Flat bottom drilling bit with polycrystalline cutters

Details Flat bottom drilling bit with polycrystalline cutters Flat bottom drilling bit with polycrystalline cutters

1988-10-13

1989-10-10

Neuder, William P.

Boring or penetrating the earth

Bit or bit element

Magnetized or with magnet

175410, E21B 1046

Patent

active

048725200

ABSTRACT:
An earth drilling bit with a body having a flat bottom. A plurality of cutting elements positioned on the flat bottom including a polycrystalline diamond cutter. The cutters include an elongate apex with a face on both sides of the apex extending backwardly from the apex. The apex extends generally vertically with a slight rake for providing a chisel surface for acting on the earth even when when the cutter becomes worn. The cutter may include multiple apexes and have zero side rake. A plurality of fluid circulating channels are provided in the flat bottom and vertically along the outside of the body and a plurality of fluid nozzles are directed outwardly at an angle to the longitudinal axis of the body.

REFERENCES:
patent: Re32036 (1985-11-01), Dennis
patent: 3027952 (1962-04-01), Brooks
patent: 4429755 (1984-02-01), Williamson
patent: 4550791 (1985-11-01), Isakov
patent: 4558753 (1985-12-01), Barr
patent: 4570726 (1986-02-01), Hall

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